Severide is hiding a serious shoulder injury sustained in the fire that killed Andy Darden, and grapples with his guilt as he fights to rescue a construction worker trapped in a building collapse. Adding to the burden, Dardens wife Heather turns on Severide at the annual firefighters barbecue, blaming him for her husbands death. A call is made to an accident site at Hancock Tower, where two teenagers are pinned in a vehicle trapped beneath the falling debris of a broken window washers cart. Meanwhile, Casey and Hallie work to figure out their future together.